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Division Spotlight
Radiation Protection & Shielding
The Radiation Protection and Shielding Division is developing and promoting radiation protection and shielding aspects of nuclear science and technology — including interaction of nuclear radiation with materials and biological systems, instruments and techniques for the measurement of nuclear radiation fields, and radiation shield design and evaluation.
Meeting Spotlight
2024 ANS Annual Conference
June 16–19, 2024
Las Vegas, NV|Mandalay Bay Resort and Casino
Standards Program
The Standards Committee is responsible for the development and maintenance of voluntary consensus standards that address the design, analysis, and operation of components, systems, and facilities related to the application of nuclear science and technology. Find out What’s New, check out the Standards Store, or Get Involved today!
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Nuclear Science and Engineering
June 2024
Nuclear Technology
Fusion Science and Technology
Latest News
Bipartisan Fusion Energy Act pushes for regulatory clarity
Sen. Alex Padilla (D., Calif.) introduced the Fusion Energy Act (S. 4151) last month with a bipartisan group of cosponsors—John Cornyn (R., Texas), Cory Booker (D., N.J.), Todd Young (R., Ind.), and Patty Murray (D., Wash.). The legislation would codify the Nuclear Regulatory Commission’s regulatory authority over commercial fusion energy systems to streamline the creation of clear federal regulations that will support the development of commercial fusion power plants—and would require a report within one year on a study of risk- and performance-based, design-specific licensing frameworks for “mass-manufactured fusion machines.
“Congress must do everything in its power to ensure continued U.S. leadership in developing commercial fusion energy facilities,” said Padilla as he introduced the bill. “The Fusion Energy Act would provide regulatory certainty for investors as the NRC develops and streamlines frameworks for such facilities.”
R. C. Briant, Alvin M. Weinberg
Nuclear Science and Engineering | Volume 2 | Number 6 | November 1957 | Pages 797-803
Technical Paper | doi.org/10.13182/NSE57-A35494
Articles are hosted by Taylor and Francis Online.
Molten fluorides of uranium, thorium, plutonium, and other elements potentially have wide applicability as fuels for power reactors. Because of their low vapor pressure they can be used in very high-temperature but low-pressure liquid-fuel reactors. In addition, they possess great chemical flexibility—the molten-salt principle can be applied to burners, thorium-uranium thermal breeders, plutonium-uranium converters, and possibly even to fast plutonium breeders. Because of the very high thermal efficiency obtainable in reactors using molten salt fuel, the fuel cost in a simple burner using enriched U235 is of the order of 2–3 mills/kwhr. A high-temperature reactor using molten uranium salts (Aircraft Reactor Experiment) was operated for a short time at the Oak Ridge National Laboratory. The reactor was of the circulating-fuel type, with a BeO moderator. The maximum outlet temperature achieved was greater than 1500°F. It is believed that with further development the ARE could be a prototype for an economical uranium burner.
